And when you need that energy, you tap it.

需要这能量时敲打它。

youdao

That means that you run the GUI only if and when you need it.

这意味着您可以只运行 GUI，或者在需要时才运行 GUI。

youdao

And when you need a boost, act like you've never lost your self-assurance.

当你需要提高时，像从未失去过自信一样去做。

youdao

Joints need cartilage for smooth movement and to absorb shock when you put pressure on a joint.

VOA: special.2010.05.19

And just intuitively, when might you need to put a backslash in front of a double quote given the examples we've seen thus far?

凭直觉来看，迄今为止，你们什么时候,会用到\“呢？,举个例子？

哈佛公开课 - 计算机科学课程节选

All right. What do you do when you've found the bug and you need to fix it?

好了，当你发现错误并修改它们的时候,你该怎么做？记住一个古老的法则？

麻省理工公开课 - 计算机科学及编程导论课程节选

Steering is spot-on, and when you need to get around city driving conditions, the throttle is there running backup.

FORBES: Car of the Week: 2013 Volvo S60

There is widespread confusion about the differences between these two documents, and when you need one rather than the other.

FORBES: Joe Paterno's Family Gives Up Trying To Keep His Will Secret

They support you on the way up and when you need them we use you just as much as you use us.

BBC: John Daly hits back at players criticising Tiger Woods